Ipsapirone

Ipsapirone (TVX Q 7821), an anxiolytic compound and a 5-HT1A partial agonist, also exhibits 5-HT1A antagonistic effect, and only at high doses it can also produce an inhibitory effect on 5-HT2 and the α1-adrenergic function[1][2].

Research Areas >> Neurological Disease

Signaling Pathways >> GPCR/G Protein >> 5-HT Receptor

Signaling Pathways >> Neuronal Signaling >> 5-HT Receptor

5-HT1A Receptor

Ipsapirone inhibits induced by 8-OH-DPAT and 5-methoxydimethyltryptamine (agonists of 5-HT1A receptors) behavioural effects (flat body posture and forepaw treading) in normal and reserpinized rats[1]. Ipsapirone (2.5-80 mg/kg), given alone to rats induces a slight flattening of body posture (~ 1 point at the highest dose) and a mild hind limb abduction observed at doses 2.5-80 mg/kg. Ipsapirone given alone at low doses (2.5-10 mg/kg i.p.) does not significantly change the body temperature in rats and mice, but decreased it in both those species at high doses (35 mg/kg i.p.) by ca. 2-2.5℃[1]. Animal Model: Male Albino-Swiss mice (18-24 g) and male Wistar rats (160-200 g)[1]. Dosage: 5 and 10 mg/kg. Administration: IP 30 min before 8-OH-DPAT and 5-MeODMT injections. Result: Behavioural responses (flat body posture, forepaw treading) to 8-OH-DPAT (5 mg/kg s.c.) in rats were antagonized by Ipsapirone (5 and 10 mg/kg i.p.).

[1]. J Maj, et al. Central action of ipsapirone, a new anxiolytic drug, on serotoninergic, noradrenergic and dopaminergic functions. J Neural Transm. 1987;70(1-2):1-17.

[2]. Stephen M. Stahl, et al. Effectiveness of ipsapirone, a 5-HT-1A partial agonist, in major depressive disorder: support for the role of 5-HT-1A receptors in the mechanism of action of serotonergic antidepressants. Int J Neuropsychopharmacol. 1998 Jul;1(1):11-18.

MOLECULAR FORMULA :

C19-H23-N5-O3-S

MOLECULAR WEIGHT :

401.53

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Unreported

SPECIES OBSERVED :

Mammal - species unspecified

DOSE/DURATION :

105 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

REFERENCE :

PCJOAU Pharmaceutical Chemistry Journal (English Translation). Translation of KHFZAN. (Plenum Pub. Corp., 233 Spring St., New York, NY 10013) No.1- 1967- Volume(issue)/page/year: 25,193,1991